Figure 3.
Change from baseline in the no-treatment and the placebo arms of the 37 analysed trials. The results are shown as standardized mean differences.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.